POST UTME IGBINEDION UNIVERSITY 2025 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A light ray passes from air into a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
B. 25°
C. 30°
D. 35°
Question 2
A uniform magnetic field of magnitude 0.5 T is directed along the z-axis. A current of 2 A flows in a circular loop of radius 0.1 m, placed in the x-y plane. What is the magnitude of the magnetic moment of the loop?
A. 0.01 A m^2
B. 0.1 A m^2
C. 1 A m^2
D. 10 A m^2
Question 3
A wave function is given by \psi(x) = A \cdot e^{-\frac{x^2}{2a^2}}. If the wave function is normalized, what is the value of A?
A. 1/\sqrt{\pi a}
B. 1/\sqrt{2a}
C. 1/\sqrt{a}
D. 1/\sqrt{2a^2}
Question 4
A projectile is launched from the ground with an initial velocity of 50 m/s at an angle of 60° above the horizontal. If the acceleration due to gravity is 9.8 m/s^2, what is the maximum height reached by the projectile?
A. 12.5 m
B. 25 m
C. 50 m
D. 100 m
Question 5
A 100 μF capacitor is connected in series with a 200 Ω resistor and a 5 V battery. If the switch is closed at time t = 0, what is the current in the circuit at time t = 10 ms?
A. 0.025 A
B. 0.05 A
C. 0.1 A
D. 0.2 A
Question 6
A particle of mass $m$ is moving in a circular path of radius $r$ with a cons\tant speed $v$. The particle experiences a centripetal force $F_c$ given by $F_c = \frac{mv^2}{r}$. If the particle's speed is doubled to $2v$, what is the new centripetal force $F_{c,new}$?
A. \frac{4mv^2}{r}
B. \frac{2mv^2}{r}
C. \frac{mv^2}{2r}
D. \frac{mv^2}{4r}
Question 7
A gas is heated from 300 K to 400 K at cons\tant volume. If the initial pressure is 1 atm, what is the final pressure?
A. 1.33 atm
B. 2.00 atm
C. 3.00 atm
D. 4.00 atm
Question 8
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. What is the current flowing through the circuit?
A. 1 A
B. 2 A
C. 3 A
D. 4 A
Question 9
A simple harmonic motion is described by the equation $x(t) = A\cos\( \omega t + \phi \)$, where $A$ is the amplitude, $\omega$ is the angular frequency, and $\phi$ is the phase angle. If the amplitude is doubled to $2A$, what is the new angular frequency $\omega_{new}$?
A. \omega
B. 2\omega
C. \frac{\omega}{2}
D. \frac{\omega}{4}
Question 10
A light ray passes through a convex lens of focal length 20 cm. If the object dis\tance is 30 cm, what is the image dis\tance?
A. 10 cm
B. 20 cm
C. 30 cm
D. 40 cm
Question 11
A particle of mass 2 kg is attached to a spring with a spring cons\tant of 100 N/m. If the particle is displaced by 0.2 m from its equilibrium position and released, what is its angular frequency?
A. 1.0 rad/s
B. 2.0 rad/s
C. 5.0 rad/s
D. 10.0 rad/s
Question 12
A wave has a frequency of 50 Hz and a wavelength of 0.2 m. What is the speed of the wave?
A. 10 m/s
B. 20 m/s
C. 30 m/s
D. 40 m/s
Question 13
A particle of mass 2 kg is moving in a circular path of radius 3 m with a cons\tant speed of 4 m/s. What is the magnitude of the force acting on the particle?
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 14
A particle of mass 2 kg is moving in a circular path of radius 3 m with a cons\tant speed of 4 m/s. If the particle is subjected to a centripetal acceleration of 2 m/s^2, what is the magnitude of the net force acting on the particle?
A. 8 N
B. 10 N
C. 12 N
D. 16 N
Question 15
A magnetic field of 0.5 T is applied to a wire of length 2 m and cross-sectional area 0.1 m^2. If the wire carries a current of 3 A, what is the magnitude of the magnetic force acting on the wire?
A. 0.3 N
B. 0.6 N
C. 0.9 N
D. 1.2 N

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